Istio-Ingress Pod证书生成失败及Istiod连接超时问题求助
Istio-Ingress Pod证书生成超时及Webhook请求失败问题排查
问题概述
初始遇到服务连接超时错误:
Error from server (ServiceUnavailable): error trying to reach service: dial tcp 172.44.30.55:15017: connect: connection timed out
通过在EKS节点安全组添加入站规则(来源为EKS集群安全组,允许所有流量和端口)解决上述问题后,出现两个新异常:
1. Istio-Ingress Pod证书生成超时日志
2023-09-10T05:18:55.390302Z warn sds failed to warm certificate: failed to generate workload certificate: create certificate: rpc error: code = Unavailable desc = connection error: desc = "transport: Error while dialing: dial tcp 10.100.19.43:15012: i/o timeout"
2. Istiod Webhook接口请求失败
执行命令:
kubectl get --raw /api/v1/namespaces/istio-system/services/https:istiod:https-webhook/proxy/inject -v4
返回错误响应:
I0909 22:59:29.079159 21513 helpers.go:246] server response object: [{ "metadata": {}, "status": "Failure", "message": "the server rejected our request for an unknown reason", "reason": "BadRequest", "details": { "causes": [ { "reason": "UnexpectedServerResponse", "message": "no body found" } ] }]
排查步骤
验证Istiod服务状态
- 检查Istiod Pod运行状态:
kubectl get pods -n istio-system -l app=istiod - 确认Istiod服务端点是否就绪,查看
Endpoints字段是否包含10.100.19.43:15012:kubectl describe svc istiod -n istio-system - 查看Istiod Pod日志,排查自身启动或连接异常:
kubectl logs -n istio-system -l app=istiod --tail=100
- 检查Istiod Pod运行状态:
测试跨Pod网络连通性
从Istio-Ingress Pod内直接测试到Istiod端点10.100.19.43:15012的连通性:kubectl exec -n istio-ingress -it <你的istio-ingress-pod名称> -- curl -v telnet://10.100.19.43:15012检查集群网络策略
确认没有网络策略限制Istio-Ingress到Istiod的流量:kubectl get networkpolicies -A重点检查是否存在拒绝
istio-ingress命名空间向istio-system命名空间发起15012端口请求的规则。验证Webhook配置
- 检查Istio Sidecar注入Webhook的状态:
kubectl get mutatingwebhookconfiguration istio-sidecar-injector - 查看Webhook的服务配置是否正确:
kubectl describe mutatingwebhookconfiguration istio-sidecar-injector - 尝试重启Istiod部署,修复可能的配置异常:
kubectl rollout restart deployment istiod -n istio-system
- 检查Istio Sidecar注入Webhook的状态:
确认SDS相关配置
检查Istio-Ingress Pod的环境变量,确认Istiod地址配置正确:kubectl exec -n istio-ingress <你的istio-ingress-pod名称> -- env | grep ISTIOD_ADDR
内容的提问来源于stack exchange,提问作者Rad4
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